独立民调显示众多盟友对美评价偏向负面：认为美国“不可靠”，是“世界舞台上的负面力量”

Group 1 - The core viewpoint of the article highlights a significant shift in perception among America's close allies, who now view the U.S. as unreliable and a negative force on the global stage following recent diplomatic policy changes [1][2] - A majority of Canadians, Germans, and French respondents believe the U.S. poses a challenge to their countries rather than being a supportive ally, with notable percentages expressing distrust in the U.S. during crises [2][3] - The article notes that European leaders are actively trying to manage the increasingly strained bilateral relations with the U.S., with Germany accelerating defense spending reforms in response to U.S. policy unpredictability [3][4] Group 2 - The relationship between the U.S. and Canada has deteriorated sharply due to trade wars and aggressive rhetoric from the U.S., leading to significant economic consequences for Canadian industries [4] - Despite the negative perceptions abroad, nearly half of Americans still believe the U.S. supports global allies and is a trustworthy force, although there is a stark divide in opinions between Democrats and Republicans regarding the U.S.'s international image [4][5] - The article indicates a dramatic shift in Democratic voters' views on the U.S. as a positive global force, with only 58% holding this belief compared to 77% of Trump supporters, reflecting a growing partisan divide [5]